Internal combustion engine



: 'Nbv. 12, 1940; F H 2,221,287

INTERNAL COMBUSTION ENGINE Filed Nov. 29, 1939 In venlor Frilz Huber/QM/f/17 Patented Nov. 12, 1940 UNITED STATES INTERNAL CODIBUSTIONENGINE Fritz Huber, Mannheim, Germany, as Signor to Heinrich Lanz A.-G.,Mannheim, Germany Application November 29, 1939, Serial No. 306,645 InGermany November 16, 1934 6 Claims. (Cl. 123-33) This invention relatesto an internal combustion engine provided with an eddy chamber.

In eddy chamber engines having a vertical ignition or discharge duct itis known to arrange the nozzle in the direction of the duct so that fuelis squirted into the cylinder when the engine is started. It is furtherknown to have the discharge duct enter obliquely at the edge of thecylinder and to construct a portion of the eddy l0 chamber in the formof a removable separate member which is heated from the outside.

The invention difiers from the known art in providing for a novelarrangement of the removable member, the nozzle and an electric heating15 means in eddy chamber engines in which the nozzle and the dischargeduct are disposed obliquely and nearly alike in such manner that duringstarting fuel is squirted approximately at v the edge of the cylinderinto the gap formed be- 20 tween the piston head and the cylinder cover.The feature of the invention is that the removable or insertable memberconstituting the -un-,

cooled'portion of the eddy chamber and being heatable from withoutextends from the nozzle 25 at least up to the discharge duct and thatthe electric heating means is positioned at the other side of thenozzle.

This arrangement involves the following advantages: The uncooledremovable member may 30 be made relatively large with respect to thecooled portion of the eddy chamber, and it may be taken out withoutinterfering with other connections to permit inspection of the eddychamber, the discharge duct and of the piston head 35 from the outside.Furthermore, the construction of the cylinder cover is quite simple withrespect to the casting and machining work involved, it avoids protrudingparts and leaves sufficient space on the cylinder for the accommoda- 0tion of large valves, the eddy chamber, the removable member and theheating means being all contained within the cover.

The invention is illustrated by way of example in the accompanyingdrawing, in which Figures 1 and 2 show two constructional embodiments ofthe invention.

In the constructions shown,'a represents the cylinder; (1., the edge ofthe cylinder; b, the

cylinder cover; 0, the eddy chamber; (1, the dis- 50 charge duct; e, thenozzle; and I, an electric heating device. In both embodiments the axisof the nozzle e is arranged at an acute angle to the axis of. the duct11 which tangentially enters the eddy chamber 0 and extends at an acute55 angle to the axis of the cylinder a.

In Fig. 1 the letter 9 and in Fig. 2 the letter 1' designate theremovable or insertable member whose bottoms h. and 7c, respectively,form the withdrawable portion of the eddy chamber 0. The parts It and kare located directly and on one side next to the nozzle e, and theheating device 1 is disposed at the other side thereof. The central axesof the members 9 andi lie in planes running either at right angles (Fig.l) or parallel (Fig. 2) to the cylinder axis. As shown in 10 Fig. 2, theaxis of the removable member i is positioned between the cylinder axisand the equidirected axis of the eddy chamber 0.

In the construction shown in Fig. 1 the member It extends up to thedischarge duct (1. In Fig. 2 the removable member 1 has been drawn downto the edge of the cylinder and in its lower portion takes up thedischarge duct 02. To insure uniform temperature of the eddy chamber 0in the latter construction a free space v 2" must remain between themember 10 and the opposite wall and extend up to the combustion space ofthe cylinder.

I claim:

1. A cylinder head for an internal combustion engine comprising, incombination, an eddy chamber, passage means tangentially connected withsaid eddy chamber and being inclined with respect to the head wall andto the axis of the engine cylinder a fuel nozzle means terminating insaid eddy chamber and having an axis inclined with respect to thecylinder axis generally in the same direction as is the axis of saidpassage means, a heating device terminating in said 'eddy chamberon oneside of said nozzle means,

and a substantially hollow, uncooled removable member disposed on theother side of said nozzle means and having a curved surface portionforming apart of the interior wall of said eddy chamber extending fromsaid nozzle to said 40 passage means.

2. A cylinder head for an internal combustion engine comprising, incombination, an eddy chamber, passage means tangentially connected withsaid eddy chamber and being disposed at .an acute angle with respect tothe axis of the engine cylinder, a fuel nozzle means terminating in saideddy chamber and having an axis inclined with respect to the cylinderaxis in substantially the same direction as is the axis of said passagemeans, a heating device disposed laterally with respect to said nozzlemeans and terminating in said eddy chamber, and a substantially hollow,-uncooled plug member removable directly from outside and disposed at thewith said eddy chamber and being inclined with respect to the head walland to the axis of the engine cylinder a fuel nozzle means terminatingin said eddy chamber and having an axis inclined with respect to thecylinder axis generally in the same direction as is the axis of saidpassage means, a heating device disposed laterally with respect to saidnozzle means and terminating in said eddy chamber, and a substantiallyhollow, uncooled removable member having a curved surface portionforming a substantial portion of the interior wall of said eddy chamber,said portion extending from said nozzle to said passage means andcontinuing tangentially. into a wall portion of said passage means.

4. A cylinder head for an internal combustion engine comprising, incombination, an eddy chamber, passage means tangentially connected withsaid eddy chamber and being inclined with respect to the head wall andto the axis of the engine cylinder, a fuel nozzle means terminating insaid eddy chamber and having an axis inclined with respect to thecylinder axis generally in the same direction as is the axis of saidpassage means, a heating device disposed laterally with respect to saidnozzle means and terminating in said eddy chamber, and a substantiallyhollow, uncooled removable pluglike member having a curved surfaceportion forming a part of the interior wall of said eddy chamberextending from said nozzle to said passage means and' having a wallportion tangentially continuing into a wall portion of said passagemeans, the

axis of said pluglike member being disposed substantially at a rightangle with respect to the axis of the engine cylinder.

5. A cylinder head for an internal combustion engine comprising, incombination, an eddy chamber passage means tangentially connected withsaid eddy chamber and being inclined with respect to the head wall andto the axis of the engine cylinder, a fuel nozzle means terminating insaid eddy chamber and having an axis inclined with respect to thecylinder axis in substantially the same direction as is the axis of saidpassage means, a heating device disposed laterally with respect to saidnozzle means and terminating in said eddy chamber, and a substantiallyhollow, uncooled removable pluglike member having a curved surfaceportion forming a part of the interior wall of said eddy chamberextending from said nozzle to said passage means, said pluglike memberbeing disposed between the axis of the engn'ne cylinder and said nozzlemeans and removable directly from outside and including said passagemeans.

6. A cylinder head for an internal combustion engine comprising, incombination, an eddy chamber, passage means tangentially connected withsaid eddy chamber and being inclined with respect to the head wall andto the axis of the engine cylinder, a fuel nozzle means terminating insaid eddy chamber and having an axis inclined with respect to thecylinder axis in substantially the same direction as is the axis of saidpassage means, a heating device disposed laterally with respect to saidnozzle means and terminating in said eddy chamber, and a substantiallyhollow, uncooled pluglike member removable directly from outside andhaving a curved surface portion forming a part of the interior wall ofsaid eddy chamber extending from said nozzle to said channel means, saidpluglike member including said passage means, and having a cavityextending around said curved surface portion and adjacent to saidpassage means and the engine cylinder.

FRITZ HUBER.

